Room-temperature rapid synthesis of metal-free doped carbon materials

Zhang, Guoxin; Wang, Jindi; Qin, Bangchang; Jin, Xiuyan; Lin, Wang; Li, Yaping; Sun, Xiaoming

doi:10.1016/j.carbon.2016.12.093

Cited by 21 publications

(17 citation statements)

References 43 publications

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“…20,21 Additionally, it was also revealed that the dehalogenating carbon sites were highly reactive to couple adjacent alien atoms; for instance, even stable DMF solvent could be used as N-source to obtain N-doped carbon materials. 19,22 Considering PVC is one typical sort of halogenated polymers, we propose that the dehalogenation strategy could be useful for the effective defunctionalization of PVC wastes and conversion into value-added doped carbon materials.…”

Section: Introductionmentioning

confidence: 99%

Converting Polyvinyl Chloride Plastic Wastes to Carbonaceous Materials via Room-Temperature Dehalogenation for High-Performance Supercapacitor

Chang

Pang

Dang

et al. 2018

ACS Appl. Energy Mater.

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Polyvinyl chloride (PVC) plastics are widely applicable in our daily life; however, their overuse and extremely high resistance to recycling/disposal have caused serious challenges to our environment. In this study, we proposed an effective and green method to convert PVC plastics to carbonaceous materials via KOH-assisted roomtemperature dehalogenation, along with the formation of clean byproducts of KCl and H 2 O. Thereof, high-quality porous carbon materials are obtainable through performing simple annealing on the above-mentioned carbonaceous materials. The as-resulted carbon materials derived from PVC plastics were fabricated into electrodes for supercapacitor application. Remarkably, the porous carbon material derived from PVC plastic wrap (PW-C) exhibited excellent performance for aqueous symmetric supercapacitor. The specific capacitance reached up to 399 and 363 F g −1 (at 1.0 A g −1 ) in 6.0 mol L −1 KOH and 1.0 mol L −1 H 2 SO 4 electrolytes, respectively. Meanwhile, PW-C showed very good rate capability and cycling stability in both electrolytes. Therefore, our developed method is capable of treating PVC plastic wastes safely and efficiently and converting them into valued-added porous carbon electrode materials, which may find very soon practical implantations.

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Section: Introductionmentioning

confidence: 99%

Converting Polyvinyl Chloride Plastic Wastes to Carbonaceous Materials via Room-Temperature Dehalogenation for High-Performance Supercapacitor

Chang

Pang

Dang

et al. 2018

ACS Appl. Energy Mater.

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“…The C1s core-level spectrum was divided into three components centering at 284.6, 285.5 and 289.0 eV ( Fig. 4(e)), being ascribed to the primary C-C/C=C carbon bonds, residual C-O bonds and C=O bonds formed in the pyrolysis process of PS [19] . As displayed in Fig.…”

Section: Resultsmentioning

confidence: 99%

Hollow Carbon Sphere with Tunable Structure by Encapsulation Pyrolysis Synchronous Deposition for Cefalexin Adsorption

Liu

et al. 2020

Journal of Inorganic Materials

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Hollow carbon spheres (HCS) with controllable diameter and shell thickness using a simple encapsulation pyrolysis synchronous deposition method is reported. This method changed the polystyrene spheres (PS), a widely used sacrifice hard template, into carbon by a pyrolysis and synchronous deposition process in the hermetical silica shell, without any cross-linking agent and catalyst, simplifying synthesis, and lowering costs. The obtained HCS exhibited uniform spherical morphology with tailorable particle size (190-1600 nm) and well controlled hollow voids. Moreover, HCS samples with precisely tuned thickness (4.5-13.5 nm) were obtained only by changing the silica precursor amount. The resultant HCS showed promising potential for applications in cefalexin adsorption with capacity of 291 mg•g-1. Therefore, this synthetic strategy may offer an efficient production route to commercial applications for HCS.

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“…To realize high‐rate anode and cathode for Li‐based batteries, we are motivated to design porous carbon materials with multiple dopants for low‐energy barrier Li‐ion landing, large specific surface area (SSA) for more electrochemically accessible surface area, and rich pore hierarchy for fast mass transportation. Thanks to the high efficiency of incorporating heteroatom doping, ball milling thiourea with PVDC (carbon source), KOH (main dehalogenation agent and micropore generation agent [ 34,36 ] ), and NaNH 2 (mesopore and macropore generation agent [ 35,37 ] ) in the strong polar solvent of DMF at room ambiance would readily form highly carbonized material.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical porous N,S‐codoped carbon material derived from halogenated polymer for battery applications

et al. 2020

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Herein, a hierarchically porous N, S‐co‐doped carbon material (named as NS‐C) has been efficiently fabricated from halogenated polymer to meet the targets of the low‐cost anode and cathode materials for Li‐based batteries. Thanks to its large N (∼5.4 at.%) and S (∼1.1 at.%) contents, large specific surface area (∼1510 m2 g–1), and beneficial pore hierarchy, the NS‐C exhibits superior bifunctional performance as anode material and S host for Li‐S cathode. The NS‐C/sulfur composite (named as S@NS‐C) delivers a large capacity of 1125 mAh g–1 at 0.1 C and maintains a capacity of 401 mAh g–1 at 5 C. A continuous long‐term use for 200 cycles at 2 C achieves large capacity retention of 80.5%. Furthermore, the NS‐C can also serve as anode material for stable Li‐ion storage with large capacity, showing very limited capacity fading for over 1000 cycles at both 0.1 and 1.0 A g–1. Moreover, considering the huge amount of halogenated polymer plastic wastes buried, burned, or discarded in the environments, our developed route of simple conversion of halogenated polymers into functional carbon materials for Li‐ion battery anode and S host for Li‐S battery cathode is advantageous for both environmental protection and Li‐based battery industry.

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Room-temperature rapid synthesis of metal-free doped carbon materials

Cited by 21 publications

References 43 publications

Converting Polyvinyl Chloride Plastic Wastes to Carbonaceous Materials via Room-Temperature Dehalogenation for High-Performance Supercapacitor

Converting Polyvinyl Chloride Plastic Wastes to Carbonaceous Materials via Room-Temperature Dehalogenation for High-Performance Supercapacitor

Hollow Carbon Sphere with Tunable Structure by Encapsulation Pyrolysis Synchronous Deposition for Cefalexin Adsorption

Hierarchical porous N,S‐codoped carbon material derived from halogenated polymer for battery applications

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